HYDRO22788

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 12/12/1991
• Doc Name: QTRLY SEDIMENTATION POND INSPECTIONS SENECA II-W MINE
• From: PEABODY COAL CO WESTERN DIV
• To: MLRD
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Ron Gehrke
NPDES I.D. NO.: CO-00002 1 D.P. 006
FACILITY CONFIGURATION: Cross-Va le Pond
SITE NAME: Pond #00
MINE NAME: Seneca Mine II-W Peabody Coa Co
MINE I.D. NO.: CMLRD Permit No. C-82-057
DATE: 11/21/91
DATE LAST INSPECTION:
LOCATION: NW~,NW;, Sec.2 5N,R88W
LOCATION: 8 mi. 5 of Hayden, C
OWNER'S REP.: Scott Williams. Supt.
Circle or write in appropriate response
1. Foundation preparation (removal of vegetation, stumps, topsoil): _ Yes No N/A
2. Lift thickness: 12 in. N/A
3. Compaction according to approved plan: Yes No NJA
4. Burning (specify extent and location): Yes No N/A
5. Angle of slope: 3:1 upstream, 3:1 downstream Total = 6:1 N/A
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yes N/
At isolated points on embankment slopes: Yes o A
At natural hillside: Yes ~o N/A
Over widespread areas: Yes o N/A
From downstream foundation area: Yes N/A
"Boils" beneath stream or ponded water: Yes o N/A
7. Cracks or scarps on crest: Yes NO N/A
8. Cracks or scarps on slope: Yes N N/A
9. Sloughing or bulging on slope: Yes No N/A
10. *Major erosion problems: Yes No NJA
11. Surface movements in valley bottom or on hillside: Yes No N/A
12. *Erosion of toe: Yes No N/A
13. *Water impounded against toe: Yes No N/A
14. Existing embankment freeboard: 15.6 feet
15. Increase X Decrease in water level: t_0 feet
16. Cracks, bulging, or erosion on upstream face: Yes No N/A
17. Visible sumps or sinkholes in slurry surface: Yes No NJA
18. *Clogging
Spillway channels and pipes: Yes No
Decant system: Yes Lo P
Diversion ditches: Yes No A
19. *Cracking or crushing of pipes
Spillway pipes: Yes No
Decant system: Yes o /A
20. Trash racks clear and in place: Yes No N/A
*Maior adverse changes in these items could cause instability and should be reported to the
Engineering Manager and Mine Superintendent for further evaluation. Adverse conditions
noted in these items should normally be described (extent, location, volume, etc.) in the
space on the back of this sheet.